INVT GD270-075-4 Special Inverter for Pump & Fan VFD

The INVT GD270-075-4 is a specialized Variable Frequency Drive (VFD) engineered for optimal performance in fan and pump applications. This unit boasts a 75kW motor capacity, a 3-phase power supply, and operates within a voltage range of 380-480V. Its core advantages lie in its advanced vector control technology, robust energy-saving features, and integrated application macros designed to simplify setup and operation for engineers. The GD270-075-4 is part of INVT's Goodrive series, offering a compact, book-type design for easy installation and a reinforced PCB coating for enhanced durability in harsh environments.

Product Specifications

| Parameter                | Specification                                       |

| :----------------------- | :-------------------------------------------------- |

| Model                    | GD270-075-4                                         |

| Rated Power (kW)         | 75                                                  |

| Rated Output Current (A) | 150                                                 |

| Input Voltage (V)        | 380–480 (3-phase)                                   |

| Output Frequency (Hz)    | 0-400                                               |

| Motor Compatibility      | Synchronous and Asynchronous Motors                 |

| Protection Level         | 3C3 and 3S3                                         |

| Operating Temperature (°C)| -10 to 50 (derating above 40°C)                     |

| Degree of Protection     | IP20                                                |

| Dimensions (mm)          | 352 (W) x 580 (H) x 258 (D)                     |

| Weight (kg)              | Approx. 18                                      |

| Communication Interface  | RS485 (Modbus RTU), Optional CANopen, Profinet, etc. |

Core Features & Market Positioning

The INVT GD270-075-4 distinguishes itself in the market through its specialized design for fan and pump applications, integrating features that directly address the operational demands of these sectors. Its advanced vector control algorithms ensure precise motor speed regulation, crucial for maintaining consistent system performance and energy efficiency. The embedded application macros, including PID control, multi-pump control, and constant pressure water supply, significantly reduce the complexity of configuration and commissioning, positioning it as a user-friendly yet powerful solution. Furthermore, the inclusion of an ECO energy-saving control algorithm optimizes power output for minimal loss, particularly under low dynamic loads, directly contributing to reduced operational costs. Its robust construction, featuring an independent air duct design and thickened circuit board coating, enhances its reliability and longevity in challenging industrial environments.

Key Application Scenarios

This specialized VFD is ideally suited for a wide array of industrial applications where precise control of fans and pumps is essential. Common use cases include:

  Wastewater Treatment: Maintaining optimal flow rates and pressure for pumping and aeration systems.  HVAC Systems: Precise control of fans and pumps in heating, ventilation, and air conditioning for energy efficiency and occupant comfort.  Municipal Water Supply and Heating: Ensuring stable water pressure and flow for distribution networks and district heating systems.  Chemical Industry: Managing flow rates and pressures in various chemical processing applications.  Metallurgical Industry: Controlling pumps and fans in cooling systems and material handling processes.  Electric Power Industry: Optimizing fan speeds in power generation cooling towers and pump operations in associated infrastructure.  Irrigation Systems: Precise water delivery for agricultural applications.

The GD270-075-4's built-in functions for these sectors, such as PID control and multi-pump management, streamline system integration and operation.

Practical System Integration Guidance

Integrating the INVT GD270-075-4 into an industrial system requires careful attention to electrical connections and parameter setup. The VFD supports various control methods, including digital, analog, pulse frequency, multi-step speed, simple PLC, PID, and communication-based control.

Wiring:

Standard wiring practices for main and control circuits should be followed, adhering to the diagrams provided in the operation manual. For optimal electromagnetic compatibility (EMC), it is recommended to use symmetrical shielded cables for motor connections. The VFD supports various communication protocols, including RS485 (Modbus RTU), and optional expansions for Profibus-DP, Profinet, and CANopen, enabling seamless integration into larger control systems.

Parameterization:

The VFD comes with pre-embedded application macros for fans and pumps, simplifying initial setup. Key parameters to configure include motor characteristics, desired control mode (e.g., V/f control, sensorless vector control), and specific application functions like PID loops or multi-pump sequencing. For fan applications with varying loads, the ECO energy-saving mode should be considered to optimize performance and reduce energy consumption. For pump applications, features like "fire ride-through" ensure continuous operation during emergencies, and "desilting" functionality aids in automatic pump cleaning.

Operation and Risk Mitigation

Safe and efficient operation of the INVT GD270-075-4 is paramount. Users must consult the operation manual for detailed safety precautions and installation guidelines.

Safety:

The VFD is equipped with protection functions against overcurrent, overvoltage, undervoltage, and overtemperature. For enhanced safety, particularly in applications where immediate motor shutdown is critical, the GD270-075-4 (specifically -EU models) supports the Safe Torque Off (STO) function, which provides a direct safety stop. When using STO, ensure safety input signal wires are shielded and kept within a recommended length of 25m.

Troubleshooting and Error Codes:

While robust, VFDs can encounter operational issues. Common troubleshooting steps involve checking power supply stability, motor connections, and parameter settings. The operation manual provides a comprehensive list of fault codes and their corresponding corrective actions. For instance, overcurrent faults might indicate a motor issue or incorrect acceleration/deceleration ramp settings, while overvoltage could stem from high grid voltage or excessive regeneration in the system. Referencing specific error codes in the manual is crucial for accurate diagnosis and resolution.

Scalability & Long-Term Value

The INVT GD270-075-4 offers significant long-term value through its flexible configuration and expandability, ensuring it can adapt to evolving industrial needs.

Connectivity and IIoT Integration:

The VFD supports a range of industrial communication protocols, including RS485, CANopen, and Profinet, facilitating integration into SCADA systems and industrial control networks. Furthermore, it supports wireless communication modules (GPRS, WiFi, Bluetooth), enabling remote monitoring and data upload to cloud platforms for IIoT applications, predictive maintenance, and advanced analytics.

System Expansion:

With optional expansion cards for I/O and communication modules, the GD270-075-4 can be customized to meet specific application requirements. This includes adding more digital and analog I/O points or integrating with specialized industrial networks. The availability of optional DC and AC reactors can help meet harmonic distortion requirements in various grid conditions, further enhancing system compatibility and long-term reliability.

*

Frequently Asked Questions (FAQs)

Q1: What are the primary advantages of the INVT GD270-075-4 over general-purpose VFDs?

The GD270-075-4 is optimized for fan and pump loads, featuring dedicated application macros. These include functions like PID control and multi-pump management, simplifying setup and improving efficiency for these specific applications. Its energy-saving ECO algorithm is tailored for variable torque loads common in fans and pumps.

Q2: Can the INVT GD270-075-4 drive both synchronous and asynchronous motors?

Yes, the INVT GD270-075-4 is designed to drive both synchronous motors (SMs) and asynchronous motors (AMs). This broad motor compatibility enhances its versatility across different installation scenarios and equipment types.

Q3: What are the key technical specifications of the INVT GD270-075-4?

It is a 75kW, 3-phase VFD with a rated output current of 150A and an input voltage range of 380-480V. The output frequency range is 0-400Hz, and it operates within an ambient temperature range of -10°C to 50°C.

Q4: How does the GD270-075-4 handle harsh environmental conditions?

This VFD features an independent air duct design and thickened circuit board coating. It also complies with 3C3 and 3S3 protection levels, significantly enhancing its reliability and durability in challenging industrial environments.

Q5: What communication protocols does the INVT GD270-075-4 support?

It natively supports RS485 with Modbus RTU. Additionally, it offers flexible expansion options for mainstream industrial buses such as Profibus-DP, Profinet, and CANopen, allowing for integration into diverse control systems.

Q6: What are the benefits of the ECO energy-saving control algorithm?

The ECO algorithm ensures optimal performance and minimal energy loss, especially at low dynamic loads. This leads to reduced operating costs and a more sustainable operational profile for fan and pump systems.

Q7: How does the GD270-075-4 support system scalability and future integration?

The VFD supports optional expansion cards for I/O and communication modules. It also enables wireless communication, facilitating data upload to cloud platforms for IIoT applications and remote monitoring.

Q8: What safety features are integrated into the INVT GD270-075-4?

It includes standard protection functions like overcurrent, overvoltage, and overtemperature protection. Notably, EU models support the Safe Torque Off (STO) function for enhanced emergency stop capabilities.

Q9: How does the GD270-075-4 simplify installation and commissioning?

The VFD features a book-type design for easy installation and comes with pre-embedded application macros for fans and pumps. This "install and play" approach significantly improves commissioning efficiency for engineers.

Q10: Can this VFD be used in applications requiring constant water pressure?

Yes, the GD270-075-4 has built-in application macros specifically for constant pressure water supply systems. This allows it to effectively manage pump speeds to maintain a stable pressure output.